diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Kconfig | 3 | ||||
| -rw-r--r-- | lib/Makefile | 1 | ||||
| -rw-r--r-- | lib/memregion.c | 18 |
3 files changed, 22 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 3321d04dfa5a..681b7e50490e 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -605,6 +605,9 @@ config ARCH_NO_SG_CHAIN config ARCH_HAS_PMEM_API bool +config MEMREGION + bool + # use memcpy to implement user copies for nommu architectures config UACCESS_MEMCPY bool diff --git a/lib/Makefile b/lib/Makefile index b7f0ea999d48..c2f0e2a4e4e8 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -214,6 +214,7 @@ obj-$(CONFIG_GENERIC_NET_UTILS) += net_utils.o obj-$(CONFIG_SG_SPLIT) += sg_split.o obj-$(CONFIG_SG_POOL) += sg_pool.o +obj-$(CONFIG_MEMREGION) += memregion.o obj-$(CONFIG_STMP_DEVICE) += stmp_device.o obj-$(CONFIG_IRQ_POLL) += irq_poll.o diff --git a/lib/memregion.c b/lib/memregion.c new file mode 100644 index 000000000000..77c85b5251da --- /dev/null +++ b/lib/memregion.c @@ -0,0 +1,18 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* identifiers for device / performance-differentiated memory regions */ +#include <linux/idr.h> +#include <linux/types.h> + +static DEFINE_IDA(memregion_ids); + +int memregion_alloc(gfp_t gfp) +{ + return ida_alloc(&memregion_ids, gfp); +} +EXPORT_SYMBOL(memregion_alloc); + +void memregion_free(int id) +{ + ida_free(&memregion_ids, id); +} +EXPORT_SYMBOL(memregion_free); |